Trinidad mud volcanoes: where do the expelled fluids come from?

Dia, Aline; Castrec‐Rouelle, Maryse; Boulègue, Jacques; Comeau, Paul

doi:10.1016/s0016-7037(98)00309-3

Cited by 88 publications

(71 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Elevated B, Ba, Sr, and Li contents have been interpreted as secondary enrichment, probably because clay dehydration was partly reversed during liquefaction and mud mobilization. Other examples of enriched muds include the Mediterranean Ridge MVs [Deyhle and Kopf, 2001], Trinidad [Dia et al, 1999], and the serpentine domes in the Marianas [Mottl, 1992]. In addition, the muds of these MVs are enriched in the same elements.…”

Section: Origin Of Aqueous Fluidmentioning

confidence: 99%

“…The subsurface structure of many of the MVs is well constrained by commercial well information and often resembles a diapiric main body with interfingering patterns from ancient mudflows (similar to the models in Figures 6b and 6c). For detailed descriptions of the MVs, reference is made to Higgins and Saunders [1974], Yassir [1989], and Dia et al [1999].…”

Section: A12 Venezuela and Trinidadmentioning

confidence: 99%

“…[87] Recently, extensive studies on the physical properties of the Trinidad muds [Yassir, 1989] and the fluid history and origin [Dia et al, 1999] were conducted. The muds generally have clay contents between 40 and 70%, corresponding to plasticity indices (i.e., range of Atterberg limits) of 15% and almost 80% [Yassir, 1989].…”

Section: A12 Venezuela and Trinidadmentioning

confidence: 99%

See 2 more Smart Citations

Significance of Mud Volcanism

Kopf

2002

Reviews of Geophysics

746

646

View full text Add to dashboard Cite

Mud volcanism and diapirism have puzzled geoscientists for ∼2 centuries. They have been described onshore and offshore in many places on Earth, and although they occur in various tectonic settings, the majority of the features known to date are located in compressional tectonic scenarios. This paper summarizes the main thrusts in mud volcano research as well as the various regions in which mud volcanism has been described. Mud volcanoes show variable geometry (up to tens of kilometers in diameter and several hundred meters in height) and a great diversity regarding the origin of the fluid and solid phases. Gas (predominantly methane), water, and mud may be mobilized at subbottom depth of only a few meters but, in places, can originate from several kilometers depth (with minor crustal or mantle input). The possible contribution of mud extrusion to global budgets, both from quiescent fluid emission and from the extrusive processes themselves, is important. In regions where mud volcanoes are abundant, such as the collision zones between Africa and Eurasia, fluid flux through mud extrusion exceeds the compaction‐driven pore fluid expulsion of the accretionary wedge. Also, quiescent degassing of mud volcanoes may contribute significantly to volatile budgets and, hence, to greenhouse climate.

show abstract

Section: Origin Of Aqueous Fluidmentioning

confidence: 99%

Section: A12 Venezuela and Trinidadmentioning

confidence: 99%

Section: A12 Venezuela and Trinidadmentioning

confidence: 99%

See 1 more Smart Citation

Significance of Mud Volcanism

Kopf

2002

Reviews of Geophysics

746

646

View full text Add to dashboard Cite

show abstract

“…Although chemical and isotopic studies of the expelled fluids are very scarce, this type of fluid might originate at least partly in dehydration in a subduction zone. The main dehydration process is thought to be a transition from smectite to illite similar to that for geopressured fluids observed in sedimentary basins (e.g., Shih, 1967;Sokolov et al, 1968;Valyaev et al, 1985;Dia et al, 1995Dia et al, , 1999Bechtel et al, 2000).…”

Section: Introductionmentioning

confidence: 83%

“…6,000 mg/L) have been observed along faults in several localities in Japan, e.g., Niigata (Oki et al, 1999;Xu et al, 2006), Horonobe (Ishii et al, 2006), Mobara gas field (Maekawa et al, 2006), and Miyazaki (Ohsawa and Ohi, personal comm.). Fluids in mud volcanoes in various part of the world also have such high δD (-20‰) and low Cl concentrations (e.g., Dia et al, 1999). Ishii et al (2006) examined the isotopic and chemical compositions of formation waters in the Horonobe area, including sample No.…”

Section: Occurrence Of Geopressured Fluidmentioning

confidence: 99%

Stable and noble gas isotopic study of thermal and groundwaters in northwestern Hokkaido, Japan and the occurrence of geopressured fluids

et al. 2010

View full text Add to dashboard Cite

owing to interaction with the surrounding rocks. In several areas, fossil sea water was found to have δ 18 O values of +5 to +8‰ due to the oxygen isotopic shift caused by the interaction, but to retain almost the same Cl concentration as fresh sea water (e.g., Sakai and Matsubaya, 1974;Mizukami et al., 1977;Shibata et al., 2005).At depths below ca. 2 km in sedimentary regions associated with oil and/or natural gas, formation waters tend to be geopressured fluid with pressures between hydrostatic and lithostatic values (e.g., Myers, 1968;Jones, 1970;Oki et al., 1999;Xu et al., 2006). The δD and δ 18 O data show that most geopressured fluid can be explained as a mixture of fossil sea water and local meteoric water, with an oxygen isotope shift due to rock-water interaction. Recently, fluids that have oilfield-like characteristic, with unusually high δD (-20‰) and low Cl concentrations (ca. 6,000 mg/L) have been observed along faults in the Horonobe area (Ishii et al., 2006). These fluids might have originated as a mixture between sea water and Stable and noble gas isotopic study of thermal and groundwaters in northwestern Hokkaido, Japan and the occurrence of geopressured fluids (Received July 14, 2009; Accepted June 7, 2010) Thermal and groundwaters are distributed along the west coast and in the inland region of Northwestern Hokkaido, Japan. The waters in the latter group have relatively high temperatures. Stable (D, O) and noble gas isotopic compositions of 23 thermal and groundwaters were analyzed to investigate their origins. The Cl concentrations vary from 45 to 19,300 mg/L and the δD values are in the range of -90 to -8‰. The δD-δ 18 O plots show a linear relationship which can be explained by a simple mixing of local meteoric waters and altered sea water, with oxygen isotopic shift of 5‰. However, a δD-Cl plot shows that there is also a contribution of an additional water component of different origin. This 3rd component has a δD value of -20‰ and Cl concentration of 6,000 mg/L. Multivariate statistical analysis of the observed chemical and isotopic compositions using the code M3 (M; multivariate mixing and mass balance) also supports the view that the Toyotomi thermal water has the composition closest to that of the 3rd groundwater component. This component is regarded as a geopressured fluid.The 3 He/ 4 He ratios in these waters are in the range of (0.1-5) × 10 -6 , which indicate contributions of both mantle and crustal He to the thermal and groundwaters in the studied area. The Toyotomi thermal water has a 3 He/ 4 He ratio of 5.5 × 10 -7 , and a high 3 He/ 20 Ne ratio (~700). These results indicate a crustal He input with a small amount of mantle-derived He and imply that the 3rd groundwater component is of deep origin. On the basis of isotopic and chemical compositions, 5 of 23 samples studied groundwater and thermal waters are contributed by a geopressured fluid component. The results show that geopressured fluids with a δD value of -20‰ and Cl concentration of 6,000 mg/L are widely distributed ...

show abstract

Active mud volcanoes on the continental slope of the Canadian Beaufort Sea

Paull

Dallimore

Caress

et al. 2015

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Morphologic features, 600-1100 m across and elevated up to 30 m above the surrounding seafloor, interpreted to be mud volcanoes were investigated on the continental slope in the Beaufort Sea in the Canadian Arctic. Sediment cores, detailed mapping with an autonomous underwater vehicle, and exploration with a remotely operated vehicle show that these are young and actively forming features experiencing ongoing eruptions. Biogenic methane and low-chloride, sodium-bicarbonate-rich waters are extruded with warm sediment that accumulates to form cones and low-relief circular plateaus. The chemical and isotopic compositions of the ascending water indicate that a mixture of meteoric water, seawater, and water from clay dehydration has played a significant role in the evolution of these fluids. The venting methane supports extensive siboglinid tubeworms communities and forms some gas hydrates within the near seafloor. We believe that these are the first documented living chemosynthetic biological communities in the continental slope of the western Arctic Ocean.

show abstract

Trinidad mud volcanoes: where do the expelled fluids come from?

Cited by 88 publications

References 22 publications

Significance of Mud Volcanism

Significance of Mud Volcanism

Stable and noble gas isotopic study of thermal and groundwaters in northwestern Hokkaido, Japan and the occurrence of geopressured fluids

Active mud volcanoes on the continental slope of the Canadian Beaufort Sea

Contact Info

Product

Resources

About